Apparatus for manufacturing a fluid dispensing nipple construction

ABSTRACT

A manufacturing apparatus wherein a conveyor longitudinally conveys tubing in a plastic state, a crimping means being located along the path of tubing movement for intermittent crimping of the tubing, and curing means along the path downstream of the crimping means.

United States Patent 1 Bittner et al.

[ July23, 1974 APPARATUS FOR MANUFACTURING A FLUID DISPENSING NIPPLE CONSTRUCTION Inventors: Charles W. Bittner; George F.

Rexon, both of Box 149, I-Iaddonfield, NJ. 08033 Filed: May 25, 1973 Appl. No.: 363,972

Related US. Application Data Division of Ser. No. 235,748, March 17, 1972, abandoned.

US. Cl 425/392, 425/329, 425/363,

, 425/385, 425/DIG. 201 Int. Cl. B29c 3/02, B29c 17/02 Field of Search 425/115, 335, 338, 363,

425/367, 392, DIG. 201, 329, 371, 317, 385,

References Cited UNITED STATES PATENTS 5/1934 Brimer 425/385 Hutchinson 425/329 X 2,704,520 3/1955 Rose et al. 425/385 X 3,012,274 12/1961 Levy 425/392 3,387,330 6/1968 Lemelson 425/385 X 3,465,384 9/1969 Barchi et al. 425/D1G. 201 3,494,009 2/l970 Woods et al 425/392 3,605,184 Mueller et al. 425/363 X Primary Examiner-Robert L. Spicer, Jr.

[5 7] ABSTRACT A manufacturing apparatus wherein a conveyor longitudinally conveys tubing in a plastic state, a crimping means being located along the path of tubing movement for intermittent crimping of the tubing, and ouring means along the path downstream of the crimping means. r

6 Claims, 7 Drawing Figures PATENTEnJuL23|s74 sum 2 or 2 APPARATUS FOR MANUFACTURING A FLUID DISPENSING NIPPLE CONSTRUCTION CROSS-REFERENCES TO RELATED APPLICATIONS This application is a division of our copening US. I

As is well known to those versed in the dispensing arts, and particularly in the arts concerned with dispensing liquid foods, considerable difficulties have been experienced in providing dispensing nipples which effectively insure santitiation, are simple and easy to use in dispensing equipment, and which may be economically manufactured for sale at a reasonable COSI.

SUMMARY OF THE INVENTION It is an important object of the present invention to provide apparatus for manufacturing fluid dispensing nipples, which apparatus effectively overcomes the above-mentioned difficulties and is extremely simple in construction and economical in operation, resulting in mass production of dispensing nipples capable of sale at a price economically justifying the disposal after a single usage. 7

Other objects of the present invention will become apparent upon reading the following specification and referring to the accompanying drawings, which form a material part of this disclosure.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts, which will be exemplified in the construction hereinafter described, and of which the scope will be indicated by the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal elevational view, somewhat diagrammatic, showing the method and apparatus of the instant invention for use in manufacture of the dispensing nipples.

FIG. '2 is a partial top perspective view showing, in greater detail, one station of the apparatus of FIG. 1.

FIG. 3 is a partial transverse sectional view taken generally along the line 3-3 of FIG. 2, enlarged for clarity.

FIG. 4 is a fragmentary sectional view similar to FIG. 3, but showing another stage in the instant operation.

FIG. 5 is a partial longitudinal view showing tubing formed in accordance with the teachings of the present invention.

FIG. 6 is a transverse sectional view taken generally along the line 6-6 of FIG. 5.

FIG. 7 is a transverse sectional view taken generally along the line 7-7 of FIG. 5.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now more particularly to the drawings, and specifically to FIG. 1, the manufacturing apparatus disclosed therein includes an extruder, generally designated 10, having an extruding head or die 11 from which it extrudes a plastic tube 12 in the direction of arrow 13. A conveyor 14 is located just downstream of the extruder head 11 for receiving the extruded tubing 12 to support the latter for downstream movement.

Just downstream of v the extruder l0 and receiving conveyor 14 is a sealing or crimping station generally designated 15. The sealing or crimping station 15 includes sealing or crimping dies 16 which serve to seal or crimp the tubing 12 at longitudinally spaced locations along the tubing, all of which will bedescribed more fully hereinafter. I

The crimped tubing 12a proceeds downstream from the crimping station 15 after which it may be cured, as by passage through a curing station 17, which may be defined by a cooling water tank.

From the curing station 17 the cured tubing 12b proceeds downstream, being pulled therealong, as through a pulling station 18 which may include one or more powdered endless belts, such as an upper belt 19 and a lower belt 20, one or both of which may be suitably powered to frictionally draw the cured tubing l2'downstream and present the cured tubing to a cutoff station, generally designated 21.

The cutoff station 21 may include a cutoff mechanism 22, which may be defined by a vertically recipro cal cutoff member or knife 23 for severing the tubing 12b. Just upstream of the cutoff mechanism 23 there may be provided a sensing mechanism 24 suitably operatively connected to the cutoff mechanism for actuating the latter. The sensing mechanism 24 serves to sense the presence of a sealed or crimped tubing region, and in response thereto actuates the cutter 23 to sever the tubing into nipple length 120 for withdrawal and discharge by an output conveyor 25'. For example, the sensing means 24 may effect operation of the cutoff mechanism 23 to sever the tubing 12b at a midregion of each seal or crimp, and also at a midpoint between seals or crirnps, so that each nipple length 120 has one end crimped or sealed and the other endopened.

Referring now more particularly to the drawings, and specifically to FIG. 2 thereof, the tube crimping mechanism is there seen in greater detail as including a plurality of pairs or sets of opposed crimping members or rolls. In particular, the crimping mechanism 16 includes a pair of generally horizontal crimping members or rolls 30 and 31, being generally coplanar with each other and disposed laterally on opposite sides of the path of tubing 12. That is, the crimping members or rolls 30 and 31 are horizontally generally coplanar with each other and with the tubing 12, and are generally laterally opposite to each other so as to be substantially tangent to each other and to the same region of the tubing 12. Both of the coplanar rolls 30 and 31 are mounted for axial rotation, as about parallel, vertical axes, but for simplicity of illustration only asingle rotary mount is shown, as at 32. The rotary mount may include a shaft 33 extending generally vertically through and carrying the roll 30, being axially driven for rotative movement by a motor or other suitable motive means 34. The roll mounting structure 32 is carried 'by a carrier or yoke 35 which may be connected by a mounting structure 32 toward and away from the path of tubing 12, generally radially of the roll'30.

The opposite roll 31 may also be suitably mounted in a similar manner, or otherwise, if desired, it being essential that the roll 31 be rotatable generally in the direction of arrow 38 ha generally rolling relation with roll 30 rotating in the direction of arrow 39.

An additional pair of opposed crimping members or rolls 40 and 41 may be employed in conjunction with the roll 30 and 31, the additional rolls being generally coplanar in a vertical plane with each other and the path of tubing 12. The crimping members or rolls 40 and 41 are suitably mounted for simultaneous rotation, as in the direction of respective arrows 42 and 43, both with each other and the rolls 30 and 31, by suitable mounting means, omitted for clarity. Also, one or more of the rolls 40, 41 may be rotatably powered, and may be movable radially toward and away from the path of tubing 12, as desired.

lt-will be seen that each of the crimping members or rolls 30, 31, 40 and 41 is provided at at least one location about the periphery thereof, and in the illustrated embodiment is provided at a pair of diametrically opposed locations with crimping elements in the nature of removable and replaceable peripheral segments. In particular, the crimping member or roll 30 is provided with a pair of diametrically opposed crimping elements 45, while the oppositely disposed crimping member or roll 31 is similarly provided with a pair of diametrically opposed peripheral, segmental crimping elements 46. This is shown in both FIGS. 2 and 3. It will also there appear that the seveal crimping rolls 30,31, 40 and 41 are each formed with a radially outwardly tapering periphery, as defined by a pair of circumferential bevel surfaces. In particular, the crimping roll 30is formed with a pair of circumferential, upper and lower bevels or convergent surfaces 50 and 51, while the opposite crimping member or roll 31 is formed with similar circumferential bevels or tapering edge surfaces 52 and 53.

In like manner, the vertically disposed opposed crimping members or rolls 40 and 41 are respectively provided with diametrically opposed segmental crimping elements 55 and 56. Further, the upper crimping roll 40 is peripherally formed with a tapered or double beveled circumference as between circumferential edge surfaces 57 and 58 of the upper roll, and 59 and 60 of the lower roll.

As seen in FIG. 4, the bevel circumferential surfaces 50 and 51 of roll 30 meet in an annular arcuately concave groove 65, while the opposite horizontal roll 30 has its circumferential bevels 52 and 53 meeting in an arcuately concave groove 65. Similarly, the circumferential bevels 57 and 58 of upper crimping roll 40 meet at an arcuately concave peripheral groove 66, while the circumferential bevels 59 and 60 of the lower crimping roll 41 meet in an arcuately concave peripheral groove 67.

As best seen in FIG. 4, the several wheels or rolls 30, 31, 40 and 41 are generally tangent to each other, with their bevel circumferential surfaces meeting and their peripheral grooves 65, 66, 67 and 68 combining to define a passageway of generally circular cross-section.

Thus, the peripheral bevels are in rolling engagement with each other, in particular the bevels 51 and 59 being in engagement with each other, as are the bevels 50 and 57 in engagement with each other, the bevels 52 and 58 being in engagement with each other and the bevels 53 and 60 being in engagement with each other. As seen in FIG. 4, the combined generally circular into receive, embracingly engage and draw along the tubing 12.

However, at the locations of the crimping or sealing elements 45, 46, and 56, the peripheral surface configurations are altered to that shown in FIG. 3. It will there by seen that the several arcuate concave grooves -68 are replaced with concavities of different configuration, respectively designated 75, 76, 77 and 78. These cavities each include an interior protuberance or projection as at 79, 80, 81 and 82. The projections 79 and 82 of opposite crimp rolls 30 and 31 protrude directly toward each other, while the projections 80 and 81 of the vertically opposed crimp rolls 40 and 41 protrude directly toward each other. However, the projections or protuberances 79, 80, 81 and 82 are each recessed into its respective crimping element 45, 55, 56 and 46, so that the opposed protuberances are spaced from eachother.

The hollows or concavities 75, 76, 77 and 78 are all configured and combined to define a closed crosssectional hollow, being of cruciform configuration in the illustrated embodiment. Further, the projections 79, 80, 81 and 82 project into the configuration of the closed hollow 75, 76, 77 and 78. By this means the material of tube 12 is squeezed, crimped, compressed or closed, as at 12d to define a seal at intermittent, spaced locations along the tubing.

The cross-sectional area of the interior hollowdefined by complementary concavities 75, 76, 77 and 78 is sufficient to insure complete closure and a squeezing, sealing action to the crimped region 12d. Further,in practice the crimped region 12d is formed with parting or molding lines, as at 85, along the outer edge of each ridge or cross part of the seal 12d. These parting or mold lines are formed by the forcing of plastic material between the rolling surfaces of the crimping rolls, and the presence of these parting or mold lines insures that the crimp 12d has been completely closed or sealed.

Subsequent to the hereinbefore described crimping operation, the intermittently sealed tubing is cured, as at station 17 in FIG. 1, and severed at station 21 into separate nipple lengths 12c. The severing may take place, as along section lines 6 and 7 of FIG. 5, resulting in a nipple having one end open and oneend closed by the seal 12d.

As appears from the formation of the seal 12d, it will I be appreciated that the peripheral cross-sections of the terior configuration of peripheral grooves 65-68 serves crimping elements, as seen in FIG. 3, merge smoothly into those of the remainders of the wheels, as seen in FIG. 4. Thus, it may be considered that the crimping elements 45, 46, 55 and 56 move radially inwardly and outwardly toward and away from the tubing 12, while moving longitudinally therealong to apply the radially inward crimping or sealing forces and simultaneously draw the tubing from the extruder 10. The crimping or.

sealing is effected by a squeezing or pinching action as between the opposite protrusions 79, 80, 81 and 82,- and further by the substantial encompassing of the sealed material within the closed configuration defined by the combined facing recesses 75, 76, 77 and 78.

From the foregoing, it is seen that the present invention provides a unique and highly advantageous apparatus for manufacture of a fluid dispensing nipple, which is'simple and reliable in construction and operation, and otherwise fully accomplishes its intended objects.

Although the present invention has been described in some detail by way of illustration and example for purposes of clarity of understanding, it is understood that certain changes and modifications may be made within the spirit of the invention.

What is claimed is:

1. Apparatus for producing tubing having spaced crimps, said apparatus comprising: a conveyor for longitudinally conveying tubing in a plastic state, crimping means located along the path of tubing movement for intermittent crimping engagement with the tubing, and curing means along said path downstream of said crimping means, for curing the tubing in crimped condition, said crimping means comprising at least a pair of opposed crimping members mounted for movement in synchronism into and out of crimp-forming relation with said tubing, said crimping members being mounted for movement toward and away from each other and simultaneous movement longitudinally along said path with said tubing.

2. Apparatus according to claim 1, said crimping members being mounted for rotation about parallel axes lying in a plane transverse of said path.

3. Apparatus according to claim 2, said crimping members comprising wheels, and peripheral crimping elements on said wheels.

4. Apparatus according to claim 3, said crimping elements comprising four wheels arranged in angularly. spaced relation, and said crimping elements having facing portions configured complementary to each other to substantially completely encompass a crimped tubing region.

5. Apparatus according to claim 4, said crimping element facing portions combining in cross-section to define a cruciform configuration.

6. Apparatus according to claim 5, said crimping indenting the crimped tube regions. 

1. Apparatus for producing tubing having spaced crimps, said apparatus comprising: a conveyor for longitudinally conveying tubing in a plastic state, crimping means located along the path of tubing movement for intermittent crimping engagement with the tubing, and curing means along said path downstream of said crimping means, for curing the tubing in crimped condition, said crimping means comprising at least a pair of opposed crimping members mounted for movement in synchronism into and out of crimp-forming relation with said tubing, said crimping members being mounted for movement toward and away from each other and simultaneous movement longitudinally along said path with said tubing.
 2. Apparatus according to claim 1, said crimping members being mounted for rotation about parallel axes lying in a plane transverse of said path.
 3. Apparatus according to claim 2, said crimping members comprising wheels, and peripheral crimping elements on said wheels.
 4. Apparatus according to claim 3, said crimping elements comprising four wheels arranged in 90* angularly spaced relation, and said crimping elements having facing portions configured complementary to each other to substantially completely encompass a crimped tubing region.
 5. Apparatus according to claim 4, said crimping element facing portions combining in cross-section to define a cruciform configuration.
 6. Apparatus according to claim 5, said crimping member facing portions each including a projection for indenting the crimped tube regions. 